實(shí)驗(yàn)五matlab三維圖形繪制實(shí)驗(yàn)

1、軟件學(xué)院 MATLAB軟件應(yīng)用 課程實(shí)驗(yàn)報(bào)告實(shí)驗(yàn)五 三維圖形繪制一、實(shí)驗(yàn)?zāi)康?掌握通用繪圖函數(shù)的使用2掌握基本三維圖形繪制3熟悉可視化圖形繪制的基本技巧二、實(shí)驗(yàn)內(nèi)容1通用繪圖函數(shù)的使用2. 三維圖形繪制三、實(shí)驗(yàn)環(huán)境1.工具軟件：MATLAB2015b 四、實(shí)驗(yàn)步驟1. 通用繪圖函數(shù)的使用(1) plot3函數(shù)-三維曲線圖形繪制函數(shù)t = 0:pi/50:10*pi;plot3(sin(t),cos(t),t)xlabel('sin(t)')ylabel('cos(t)')zlabel('t')grid onaxis square（2）plot3函

2、數(shù)的操作2>> t = 0:pi/50:2*pi;>> x=sin(t) sin(t);>> y=cos(t) cos(t);>>z= sin(t).2+cos(t).2 sin(t).2+cos(t).2+1;>>plot3(x,y,z)（3）mesh函數(shù)三維網(wǎng)格曲面>> x = -4:0.1:4;>> y=x'>> m=ones(size(y)*x;>> n=y*ones(size(x);>> p=sqrt(m.2+n.2)+eps;>> z=sin(

3、p)./p;>> mesh(z)（4）mesh函數(shù)的操作2 x = -4:0.1:4;x,y=meshgrid(x);p=sqrt(x.2+y.2)+eps;z=sin(p)./p;mesh(z);xlabel('x-axis'),ylabel('y-axis'),zlabel('z-axis');title('mesh')(5)surf函數(shù)三維曲面x=0:0.1:2*pi;x,y=meshgrid(x);z=sin(y).*cos(x); surf(x,y,z);xlabel('x-axis'),yl

4、abel('y-axis'),zlabel('z-axis');title('surf');(6)比較surf函數(shù)、mesh函數(shù)及plot3函數(shù)x=0:0.1:2*pi;x,y=meshgrid(x);z=sin(y).*cos(x);分別使用mesh(x,y,z)、surf(x,y,z)、plot3(x,y,z)，比較得到的圖形異同2. 三維圖形繪制(1)改進(jìn)的三維繪圖函數(shù)x,y=meshgrid(-8:0.5:8);z=sin(sqrt(x.2+y.2)./sqrt(x.2+y.2+eps);% p=sqrt(x.2+y.2)+eps;z=s

5、in(p)./p;subplot(2,2,1);meshc(x,y,z);title('meshc(x,y,z)')%等高線subplot(2,2,2);meshz(x,y,z);title('meshz(x,y,z)')%邊界面subplot(2,2,3);surfc(x,y,z) %等高線title('surfc(x,y,z)') subplot(2,2,4);surfl(x,y,z)title('surfl(x,y,z)')%光照面(2) 標(biāo)準(zhǔn)三維曲面球面sphere函數(shù)>> x,y,z=sphere(20);&

6、gt;> surf(x,y,z)三維柱面cylinder函數(shù)x,y,z=cylinder(0:0.2:4,20);surf(x,y,z)%圓錐>> t=0:pi/25:2*pi;>> R=sin(t);>> cylinder(R,20)(3)條形圖、填充圖、階梯圖和桿圖形式的曲面繪制使用bar3、stem3、pie3和fill3函數(shù)1)繪制魔方陣的三維條形圖。2)以三維桿圖形式繪制曲線y=2sin(x)。3)已知x= 1300,1800,2000,3025，繪制三維餅圖。4)用隨機(jī)的頂點(diǎn)坐標(biāo)值畫(huà)出五個(gè)黃色三角形。subplot(2,2,1);bar3(

7、magic(4);subplot(2,2,2);y=2*sin(-pi:pi/8:2*pi);stem3(y);subplot(2,2,3);pie3(1300,1800,2000,3025);subplot(2,2,4);fill3(rand(3,5),rand(3,5),rand(3,5), 'y' )（4）三維圖形的精細(xì)處理從不同視點(diǎn)繪制多峰函數(shù)曲面 subplot(2,2,1);mesh(peaks); view(-37.5,30); %指定子圖1的視點(diǎn) title('azimuth=-37.5,elevation=30') subplot(2,2,2)

8、;mesh(peaks); view(0,90); %指定子圖2的視點(diǎn) title('azimuth=0,elevation=90') subplot(2,2,3);mesh(peaks); view(90,0); %指定子圖3的視點(diǎn) title('azimuth=90,elevation=0') subplot(2,2,4);mesh(peaks); view(-7,-10); %指定子圖4的視點(diǎn) title('azimuth=-7,elevation=-10')（5）色彩處理colormap(m)函數(shù)和shading函數(shù) z=peaks(20);colormap(copper); subplot(2,2,1);surf(z); subplot(2,2,2); surf(z);shading flat; subplot(2,2,3);surf(z);sha